Process and apparatus for making tips on laces.



F. KOCH.

PROCESS AND APPARATUS FOR MAKING TIPS ON'LACES.

APPLICATION FILED JAN. 29, I914. Lm'l@ famme@ Aug. 3, 191:1

2 SHEETS-SHEET I.

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F. KOCH.

PROCESS AND APPARATUS FOR MAK-ING TIPS 0N LACES.

APPLICATION man 1m29. 1914.

2 SHEETS-SHEET 2.

-B/ /h' m am v rra/PNEVS l Patented Aug. 3, 1915.

FBEDRICH KOCH, F FRANKFORT-ON-THE-MAN, GEFINY.-

FRGESS N'D AFPAEATUS FOR MAKING TIPS 0N EDADES.

Speceeton of Letters Patent.

Patented Aug. E., luid.

Application lell lanualy 29, 18M. Serial No. 815,326.

bergstrasse 98g have invented new and useful .improvements in Processes and Apparatus for Making Tips on lLaces, of Whieh the'iollowing is a pspeciiicstion.

Tips of Celluloid or the like have hitherto been hired on laces by pressing short tubular pieces oi' Celluloid thereon. @ne procedure has beento draw a cord of twice the length.

A oa lace through a Celluloid tube ,which is twice as long as the tip; the tube is pressed iirmly and cut through the middle by hand.

This method has the disadvantage that it must be applied by hand and it takes much time since each Y time the cord has to' be threaded through a *new tube b' hand.

According to the 'present ention the aiiixing oi the tip occurs quite automatically as a continuous manufacturing' operation. Cords unwound from bobbins are drawn through long tubes oi celluloid or the like; from the end of each tube the tip is pressed Aonto the cord and cut ofi, one tip being thus termed at each operation. or more advantageously tuto., which' are cut through at the middle et their combined length in the pressing' die in known manner. llVhile the cords 'with the tips .thereon are held lirinly in the pressing die the tubes are moved bacio ward' along said cords through a distance corresponding with the length of a lace,

whereby a lace is marked olii fromthe cord.. The celluloid tubes together with the 'cords is similarly formed with working faces semicircular in cross section. This die has the objection that as soon as the material surrounding the cord becomes warm, as the resi'xlt of the pressure, the cord is pressed laterally through the material; when using tubes which vin the present case alone come into consideration and which as is known can never be delivered of uniform dimensions, the least deviation scarcely detectable by the naked eye, particularly in the internal diameter, will result in the above objectionable possibility. The present invention avoids this defect completely and permits a. satisfactory pressing of the tips without any danger of the cord being squeezed ,through the surrounding material. This is achievedby sin-constructing the two part pressing die thatone ofthe parts is trough-shaped, the' trough being deep and having sides inclined toward each other or diverging outwardly; thus the tube surrounding the cord when pressed from above always rolls the cord more closely or compactly together thus pressing the material iirmly around the `cord 'and preventing anyr lateral spread thereof through said material. Illhe other part of the die which exerts this pressure is formed with projecting ridges which enter into and cooperate withithe'deep trough. lhe excess of Celluloid is pushed on to the inclined sides of the trough, care being taken that the two parts oit the die close upon one another closely at the front, whereby the celluloid cannot be vsqueezed through any lopening in the front, and the cord is cut through. This arrangement 1s of particular,

importance when both tips ere to be .made at one pressing operation. if the Celluloid could be squeezed forward there would beproduced between the tips on the same cord celluloid rings drliicult to remove.

The accompanying drawings illustrate one i'orm o'apparatus ier practising the process.

Figures l- 3 are elevations showing parts of the apparatus in three different positions. Figs. i-7 show the pressing die drawn to an enlargedscale, 'Fig a being a iront elevation, Fig. 5a plan of the lower die, Fig. 6 a section on line iii-B of Fig. 5 and Fig. 7 a section on line C-D oi Fig. i.

The long Celluloid tubes a lie side by side and through them pass the lace cords as they leave the bobbins. El frame o contains a slide e which clamps all the Celluloid tubes so that it cancarry these with it when it is 'operatively actuated. The clamp nu y be of any suitable kindg for example the tubes may be held between two correspondingly formed parts fastened together by screws or pressed together by means of a lever.- @n one side of the frame c there is a relatively ixed clamp d which is :termed like slide e il@ i and holds the celluloid tubes relatively stationary when the slide c is moved back again in the frame in the course of the operation. Cooperating with the frame c is a pressing die f which consists of two parts having grooves g for pressing the Celluloid tips. In the example shown this die is as long as two tips and the groovesare so formed that by pressing them together the celluloid tube lying between them is iirmly pressed on the lace cord which extends through the tube and is cut through in the middle together with the cord Z). ln this manner two tips for two successive laces are made at the same time.y The die is so formed that the cut tip ends are rounded oil ready for use.

The apparatus works as follows: The slide e in theinitial position is at the upper end of the frame c, as shown in Fig.k l when looking at the apparatus as illustrated in the drawings, the Celluloid tubes a projecting through the said slide. The parts of the slide c are now pressed together to clamp the tubes a and the slide ismoved downwardly in the :traine c, carrying the celluloid tubes with it and causing the ends thereof to project beyond said frame 0. In the example illustrated, the .distance through which the movement occurs vcorresponds to twice the length of one tip. The die f which up to this stage has been open is now closed and presses the -Celluloid tubes firmly on the cords so that simultaneously the tubes and the cords are separated at'the middle of the die and clamped therein. Then the clamp Z which up to the present time has been open isl closed to clampl the tubes a and the clamp of the slide e opens to release the same so that the'slide may be returned to. its original position in the frame c, 'this return movement of the slide being along the tubes whichy remain in place and relatively stationary. In order-now to draw the lace cords through the tubes to the desired length of cord, the frame, ltogether with its slide and the tubes clamped therein, is drawn backward orV upward in the drawings through the desired.l distance, along the cords'which are firmly held against clamped therein is drawn backward or upward through a distance corresponding with theV desired length of the laces while these are held against movement by the die, the latter during this operation remaining relatively stationary so that the parts occupy the` relative positions shownA in Fig. 2. The die f 1s now opened to release the finished tips therein and thus free the laces after :trasera which the frame c is drawn downwardly to the same amount. Then the clamp d is opened to release the tubes'a and the 4slide e is again clamped thereonafter which the said slide e is moved downwardly again pressed length of tubes constituting the tipsv from the remainder of the tubes takes place. rlhepressing die consists of a lower die and an upper die '11. In the lower die It is cut a series of depressionsv lo, vhaving slides Z inclined to each other or diver-ging` outwardly. The bottom of .the groove-is circular .in cross section corresponding with the diameter of the Celluloid 'tube to be.

pressed'.v The upper die z' has a number of proJecting ribs m which are adaptedto enter into the depressions in of the lower die and are curved to the same radius on their lower.

surfaces,

'. `In the example shown two celluloid tips are 'simultaneously formed from one length of the Celluloid tube pushed on to the cord,

fonwhich purpose the upper and lower dieshave at' o al rib which cuts or separates the material in' the die in two at the middle into two tips and `forms them liemisphericallyT andincloses them. The lower die has on its side a sort of comb 79 which serves to close the hollowof the dieso far that only, the cord can pass out. For this purpose the cavities q between the teeth of Ithe comb have only such breadth that the cord can pass through, while the Celluloid tubes come into contact with theteethof'the comb and are prevented from passing beyond same whereby the `formation of a bur is prevented. Moreover, the upper die has on its rib m a comb r .whose teeth. as, isiapparent at s,'project to the extent of the' thickness of the wall of the celluloid tube over the ribA so that the 'formation of a bur is avoided also in the upper die.

During the pressing of the Celluloid tubes which extend into the dies the excess of celluloid is pushed laterally against the inclined walls of the lower die and here forms a thinbur which can very easily be separated later. 0n the front end, however, there is no such bur, lfor here it is prevented by the two combs of the -upper and lower dies. As shown in Figs. 5 and 7 the two dies are so arranged that on the other side .of the die at t the tubes are cut through so that two completely nished tips are prointenti duced. lf only short tubes which are ap? pronimately as long as the die itself are used instead of long tubes as shown then the upper and lower dies must also be provided on their other sides with lprojecting combs sc that the celluloid is prevented from issuing at this place and forming abur.

Having thus described my invention and the best means l know of carrying the same into practical effect, l claim.

1. The process of constructing tips for laces and applying same which consists in threading the lace through a continuous tube of tip material, separating a section of said tube therefrom and compressing said section upon said lace to combine it therewith and form the tip.v

2. The process of constructing tips for laces and applying saine which consists. in drawing the lace from a source of supply, threading it through a continuous tube of tip `material, separating a section of said tube therefrom and compressing it upon said lace to form a tip at one end thereof, moving said'tube of material along'said lace to a predetermined eil/tent'in a direction away romsaid finished tip, separating a secondv section from said tube and cutting said lace and compressing said second tube section. y,

upon said lace to complete the same and form a tip at the opposite end thereon` 3. .Theprocess of. constructing tips for laces and applying saine which consists in drawing the lace 'from a source of supply, threading itI through a continuous tube of tip material., separating a section of said tube corresponding to the length of two tips, compressing` said vsection upon. said lace and cutting through the said section and said lace to Complete a preceding lace and the tip at one end thereof and to simultaneously form a tip at the one end of the next succeeding lace, moving said tube ofY material along said lace to a predetermined extent in a direction away from said finished tip, separating a second section of said tube correspondinfT to the length of two tips, compressing said second section upon said lace and cutting through said second section and said lace to form a tip at the other end of said succeeding lace and to simultaneously form a tip at the one end of another succeeding lace.

In an apparatus for constructing tips for laces from. a continuous tube of tip material and applying such to a continuous length of lace material extending through said tube, the combination oi a support, means arranged toclamp said tube and movable relatively to said support whereby said tube is moved along said lace material and projected beyond the support and a die whereby .uid projecting portion of said tube is severed and compressed upon said lace material to form the tip.

5. In an apparatus for constructing tips for laces from a continuous tube of tip material and applying such to a continuous length of lace material extending through said tube, the combination of a support, a slide on said support adapted to clamp said tube and whereby the latter is moved along said lace lmaterial and projected beyond said support to a pi edetermined extent, anda die whereby said projecting portion of said tube is severed in two, said lace material is cut and said severed tube sections are com` pressed upon said lace material to simultaneously form tips at the opposed ends of two laces.

6. ln an apparatus for constructing tips for laces from a continuous tube of tip material and applying such to a continuous length of lace material extending through said tube, the combination of a support movm able lengthwise of said lace material, a slide on said support adapted to clamp said tube and whereby the latter is moved along said lace material and projected beyond said support to a predetermined extent, a die whereoy said projecting portion of said tube is severed in two, said lace material is cut and .said severed tube sections are compressed upon said lace material to simultaneously form tips at the op iosed ends of two laces and a clamp on sai support whereby said tube is clamped against movement relatively` thereto.

7. ln an apparatus for rcon'structiug tips for laces from a series of tubes of tip material arranged side by side and applying such to a series of continuous lengths of lace Mill cords extending through said tubes, the combination of a support, a slide on said support adapted to clamp said tubes and whereby the latterare simultaneously moved along said lace cords and projected beyond said support to a predetermined extent, a die wherefby said projecting ends are separated from said tubes and compressed upon said lace cords and cutting means in said die whereby said separated tube sections are each sev ered in two, said lace cords arecut and the severed ends of each tube section are rounded oil to simultaneously form completed tips at the opposed ends of adjacent laces.

8. 'A die for the manufacture of tipsOr laces comprising a member having a depression formed therein the sides of which diverge outwardly in a direction transverse to the length of said depression and a second member adapted to coperate with said iirst member.

9. A die for the manufacture of tips for laces comprising a member having an open ended depression formed therein the sidesy o which diverge outwardly in a direction transverse to the length of said depression, means for closing the one end of said depression to apredetermined extent and a ill@ secondmember` coperating with said first member.

l0. A die for the manufacture of tips for laces comprising-e lower and an upper member, seid lower member being formed With a depression, a rib on the upper member adapted to enter 1nd coperute With Said depressions to form the tip, comb on' said lower member projecting upwardly beyond the operative portion of said depression and e projection extending beyond the `operative snrfacef said rib, said comb and proj ection coperating to prevent tlie formation of a bur on the tip material as the tip is formed.

In testimony, that I claim the foregoing 15 as my invention, I have signed my name in presence of two witnesses, this 17th dey of January 191i.'

FRIEDRICH KOCH. Witnesses:

JEAN GRUND,

CARL GRUND.

Copies of this patent may be obtzninc for ve cents each, 'by addressing the Commissioner of Patents,

Washington, D. C. f 

